Die-stock.



110.353,,329. PATENTED MAY 14, 1907. w. H. WILSON.

DIE STOCK.

APPLIOATION FILED NOV. 24, 1905.

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PATENTED MAY 14, 1907.

W. H. WILSON- I DIE STOGK.

APPLICATION FILED NOV. 24, 1906.

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with the hub at the front, and Fig.

FFIOE.

WILLIAM H. WILSON, OF NOBWALK, OHIO.

DIE-STOCK.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed November 24, 1905. Serial No. 288,897.

To all whom, it may concern.-

Be it known that 1, WILLIAM H. \VILsON, a citizen of the United States, residing at Norwalk, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Die-Stocks; and I. do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in die-stocks, and the invention consists in a die-stock having certain novel features in its internal construction and which is provided with a shank adapting it to be attached to a lathe, all substantially as shown and de scribed and particularly pointed out in the claims.

In the accompanying drawings Figure 1 is a perspective view of the lathe in which the die-stock is supported and adapted to oper- Fig. 2 is a side elevation of the stock, and Fig. 3 is a central cross section thereof on the line 00, ac. Fig. 4 is an edge view with the handle sectioned off. Fig. 5 is a perspective view showing the inside of the check plate for the handle. Fig. 6 is a sectional elevation showing the dies in their starting positions, and Fig. 7 is a sectional elevation showing the parts in position to remove the dies. Fig. 8 is a perspective view of the base of the stock. 9 is a per one of the dies. Fig. 10 is spective view of and Fig. 11 is an inside view of the cam ring, a sectional elevation thereof.

The said base B has an annular central hub, or portion 1) which is provided with radial slots 2 of the same depth as the dies and a central bore or opening 3 between said slots, and the said hub is subdivided by said slots into four equal sections 4 which provide side walls for the dies and confine them to working position. The cam ring or cap C is adapted to be seated over the said subdividing sections 4 and dies D therein, and has slots 5 open from its edge in outer wall O and corresponding generally to the position of the several .dies D and slots 2 both as to size and arrangement. The said ring or cap O has a cam c on its inside for each of the four several dies on the inside of its outer wall C and these cams extend below or beyond the lower edge of said wall a sufficient distance to bring them on a plane with the edges of the dies on the floor of base B and engage in the annular channel or groove 7 in the outer portion of base B. Otherwise ring O and base B are flush on their outer surfaces.

The cap or ring C has limited rotation up on the base according to the necessary throw of dies D, which will be understood, and this throw is controlled in this instance by a novel construction of the cap where it engages the dies. Thus, it will be seen that cams c extend the full depth of the interior of the cap as .above suggested, and are adapted to bear against the heels or outer edges or ends of the dies their full dept so that said dies are backed their entire depth by the cams and are not dependent on a pin, a recess in the dies, or any other construction which may be injured or broken under severe strain. This is a very material improvement in the art as will be obvious, because it holds each die its full depth squarely to the work and there is no possibility of breakage at the point where power is applied to the dies.

At the top and inside of cap or ring C at what is properly the. base of cams c and in the annular inner flange 0 are eccentric grooves or channels 6, adapted to be engaged by and to provide runways for pins (1 on the edges and ends of dies D. The function of these channels and pins is simply to withdraw the dies from working position when ring O is rotarily reversed for this purpose. But said pins do not sustain any of the pressure upon the dies at work, which comes exclusively against or upon the rear or outer edges d thereof. The said grooves 6 run out through the base of the open slots 5 in the cap to facilitate theseparate removal of any one of the several dies D alone and without taking the structure apart, as will presently appear, and the dies can be withdrawn from work only when they stand directly opposite the said open slots 5, practically where cams c begin.

Now, as an additional improvement, I provide a special controlling handle or lever H for the cam ring, which has a threaded stem h adapted to be removably engaged in said ring, and said handle or lever has a flange h at the base of threaded stem h which comes outside of and bears against a late 10 having a central opening to pass end it through the same and a rib 12 on its inside adapted to run in slot 13 in guide plate G fixed to base B of the stock. It is conthe graduations 14 on the venient to have handle H, and

cam ring at this side near ICC IIO

plateG has an indicating point opposite said graduations for the guidance of the operator, as usual. However, while the more essential function of the said parts G, H, and 10 is to hold the dies in confinement, they are also intended to enable the dies to be removed and replaced, one or all, when for any reason this becomes desirable and without removing the cam ring or even taking the stock from its supports. This is accomplished by stopping the cam ring in its reverse or backward rotation before the open slots 5 in the cam ring fully uncover the ends of the dies, or notches 16 in base rim 17 come squarely in line with the dies. Said notches 16 are practically continuations of slots 2 for the dies though apart therefrom. This partially covered position of the dies is seen in Figs. 4 and 6, and in this position the small check plate 10 has reached its limit and impinges against lip 18 on the end of stop member G. But when a die is to be removed the handle H is unscrewed far enough to enable check plate 10 to be turned on threaded stem it say quarter way around, so as to take its rib 12 out of slot 13 in stop G, when a narrower side or portion of said plate being turned to the front will allow the cam ring to be rotated far enough around to aline slots 5 with notches 18 and the dies within and thus open the way for the removal of the dies. The matter of restoring the parts is obvious from this description.

The cap C is secured to the base by means of plate or collar N and screws 20 engaged into the head sections 4 ofthe base. The

base of the die-stock has no other handle or supporting portion other than the preferably I angular shank B by which it is adapted to be operatively secured in a lathe, and is so 1 shown in Fig. 1. In this figure L indicates the lathe as a whole and 21 indicates the usual centers, while 22 is a preferably compound rest carrying the die-stock. The material to be out can be held between said centers or in a chuck as may be preferred, otherwise as convenience may' suggest. For rough bolts a chuck is generally used, but for a true ob the centers are best.

What I claim is In die-stocks, a base and dies radially slidable therein, and a cam ring having open slots corresponding in size and number to said dies, in combination with means to limit the rotation of the said ring comprising a slotted guide fixed on said base and a ring controlling lever removably engaged in the ring and projecting through the slot in said guide between the ends thereof, and a check plate engaged between said guide and lever. B

In testimony whereof I sign this specification in the presence of two witnesses;

WILLIAM H. WILSON.

Witnesses:

O. M. BROWN, l C. WALDRON. 

